2120840783 has 2 divisors, whose sum is σ = 2120840784. Its totient is φ = 2120840782.

The previous prime is 2120840699. The next prime is 2120840801. The reversal of 2120840783 is 3870480212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2120840783 - 2²⁴ = 2104063567 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2120860783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060420391 + 1060420392.

It is an arithmetic number, because the mean of its divisors is an integer number (1060420392).

Almost surely, 2^2120840783 is an apocalyptic number.

2120840783 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120840783 is an equidigital number, since it uses as much as digits as its factorization.

2120840783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 2120840783 is about 46052.5871477380. The cubic root of 2120840783 is about 1284.8014617539.

The spelling of 2120840783 in words is "two billion, one hundred twenty million, eight hundred forty thousand, seven hundred eighty-three".